A student recorded the following sets of observations during the experiment to trace the path of a ray of light passing through an equilateral glass prism. S. No. ∠ i (angle of incidence) ∠ δ (angle of deviation) ∠ e (angle of emergence) I 30 ° 19 ° 77 ° II 40 ° 26 ° 46 ° III 50 ° 41 ° 51 ° IV 54 ° 59 ° 65 ° Which is the incorrect observation and why?

The relation between angle of incidence, angle of emergence, angle of prism and angle of deviation is ∠ A + ∠ δ = ∠ i + ∠ e Among the observations, the observation I is incorrect as for these readings ∠ A + ∠ δ ≠ ∠ i + ∠ e .

E M B I B E

Science Part-I NEW ERA PHYSICS Textbook for Class X>Chapter 5 - The Human Eye and Colourful World>IMPORTANT QUESTIONS>Q 7

MEDIUM

10th CBSE

IMPORTANT

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What is the angle of deviation in the diagram given below?

Important Questions on The Human Eye and Colourful World

EASY

10th CBSE

IMPORTANT

Science Part-I NEW ERA PHYSICS Textbook for Class X>Chapter 5 - The Human Eye and Colourful World>IMPORTANT QUESTIONS>Q 8

A student recorded the following sets of observations during the experiment to trace the path of a ray of light passing through an equilateral glass prism.

S. No.	$∠ i$ (angle of incidence)	$∠ δ$ (angle of deviation)	$∠ e$ (angle of emergence)
I	$30 °$	$19 °$	$77 °$
II	$40 °$	$26 °$	$46 °$
III	$50 °$	$41 °$	$51 °$
IV	$54 °$	$59 °$	$65 °$